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Seventh term of an A.P. ios 40. Then the...

Seventh term of an A.P. ios 40. Then the sum of its first 13 items is-

A

572

B

104

C

520

D

208

Text Solution

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 8
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  2. If omega is a complex cube root of unity then the value of [225 + ( 3 ...

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  3. Seventh term of an A.P. ios 40. Then the sum of its first 13 items is-

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  4. If x = sum (n =0) ^(oo) a^(n) , y = sum (n=0) ^(oo) b ^(n), z= sum (n=...

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  5. If n is a natural number, then [7 ^(2n)+2^(3(n-1)), 3 ^(n=-1)] is alwa...

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  6. If n is a positive integer then the coefficient of x ^(-1) in the expa...

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  7. The number of numbers that can be formed using the digits 3,4,5,6,7 (r...

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  8. A point P which represents a complex number z, moves such that |z-z(1)...

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  9. Solution set of the inequation |(2)/(x-4)| gt 1 (x ne 4) is-

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  10. If the 5th term of a G.P. is x, then the product of its first nine ter...

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  11. The sum of first n terms of the series 1^(2)+ 2 . 2^(2) + 3^(2) + 2. 4...

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  12. If ""^(-3) ^(n)C(r+1) then-

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  13. omega is an imaginary cube root of unity. If (1+ omega ^(2)) ^(m)=(1+o...

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  14. Locus of mid-point of the portionof the line x cos alpha + y sin alpha...

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  15. A ray of light is sent along the lie x-2y+5=0, upon reaching the line ...

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  16. The coordinates of O , A and B are (0,0) , (x,y) and (y,x) respectivel...

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  17. If t is a variable parameter, then the equation to the locus defined b...

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  18. A circel cuts intercepts of lenghts 2a and 2b from the x-axis and the ...

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  19. The ordinate of the centre of the circle passing through (0,0) and (1,...

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  20. The sides of a triangle are 3x+4y, 4x +3y and 5x +5y where, x, y gt 0,...

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