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" Q."5quad 2.4+4.7+6.10+.......(n-1)" te...

" Q."5quad 2.4+4.7+6.10+.......(n-1)" terms "=

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2.4 + 4.7 + 6.10+ …. upto (n-1) terms=

3.6+4.7+5.8+.....+(n-2) terms =

Obtain the sum of the series : 1/1.4+1/4.7+1/7.10 + .......... to n terms.

(1)/(1 . 4 . 7)+(1)/(4 .7 . 10)+(1)/(7 . 10 . 13)+.. . to n terms =

Prove 1.4.7+2.5.8+3.6.9+....... upto n terms =(n)/(4)(n+1)(n+6)(n+7)

Prove 1.4.7+2.5.8+3.6.9+....... upto n terms =(n)/(4)(n+1)(n+6)(n+7)

Prove 1.4.7+2.5.8+3.6.9+....... upto n terms =(n)/(4)(n+1)(n+6)(n+7)

Prove 1.4.7+2.5.8+3.6.9+....... upto n terms =(n)/(4)(n+1)(n+6)(n+7)

The number of terms common between the series 1+2+4+8+...... to 100 terms and 1+4+7+10+....... to 100 terms is a.6b.4 c.5 d.none of these

If S=(4)/(1.2.3)+(5)/(2.3.4)+(6)/(3.4.5)+(7)/(4.5.6)......... up to 'n' terms & S=K-((2n+5))/(2(n+1)(n+2)), Then K =?