If the number of integral terms in the expansion of is excatly 33, then the least value of n is:
Option: 1 264
Option: 2 128
Option: 3 256
Option: 4 248
Clearly r should be a multiple of 8.
There are exactly 33 integral terms possible values of r can be 0, 8, 16, ................, 32 × 8
Least value of n = 256.
n=256
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