How many terms are there in the expression (1 + x2 + x4)10 when it is expanded?

Question

Shivankan Gupta · Answer

Hi, The number of terms in a binomial expansion is given byn+r-1C r-1Here, n=10(power) and r=3(terms inside bracket)So, number of terms = 12C2 = 66

Disha Gupta · Answer

Since x can only take the even values between 1 and 42 the number of terms in the expansion will be 40/2+1 i.e. 21

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