If 2n+² – 2n+¹ + 2n = c × 2n find the value of c.
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Step-by-step explanation:
c(2n,1)+c(2n,3)=2c(2n,2)
=(2cn,c)+(2cn,3c)=4cn,4c
=2cn,c+2cn,3c=4cn,4c
=4cn,4c=4cn,4c
=(4cn-4cn),4c=4c
=4c=4c
=4c÷4=c
=c=c
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