Simplify `m times m times m times m`

(-1) is multiplied (2m-1) times, where m is a natural number. What will the product be?

Find the wavelength of electromagnetic waves of frequency 6 times 10^(12)Hz in free space having speed of 3 times 10^(8)m/s in free space. (a) 6 times 10^5m (b) 5 times 10^-5m (c) 2.5×10^5m (d) 1.5×10^5m

If m times the m^(t h) term of an A.P. is equal to n times its n^(t h) term, show that the (m+n)^(t h) term of the A.P. is zero.

If m times the m^(t h) term of an A.P. is equal to n times its n^(t h) term, show that the (m+n)^(t h) term of the A.P. is zero.

If the A.M between a and b is m times their H.M then a:b is

A coin is tossed (m+n) times with m>n. Show that the probability of getting m consecutive heads is (n+2)/2^(m+1)

If m times the mth term of an AP is equal to n times its nth term, then show that (m + n)th term of an AP is zero.

A door-frame of dimensions 3m xx 2m fixed on the wall imension 10m xx 10m. Find the total labour charges for painting the wall if the labour charges for painting 1 m_2 of the wall is Rs2.50.

A wall of length 10 m was to be built across an open ground. The height of the wall is 4 m and thickness of the wall is 24 cm. If this wall is to be built up with bricks whose dimensions are 24\ c m\ xx\ 12\ c m\ xx\ 8\ c m , how many bricks would be required?

The leng th of a rectangle is three times its width and its perimeter 56m. The length is (a)7 m (b) 14 m (c)21 m (d) 28 m