Question

3. For an AP, if Sn = 5n2-3n, then an = 10n - 8. state true or false
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Answer 1

Answer:

False.

Step-by-step explanation:

sn = 5n2 - 3n

S1 = 5(1)2 - 3(1)

= 10 - 3

= 7

so, first term = 7

Now,

an = 10n - 8

a1 = 10(1) - 8

= 10 - 8

= 2

so, first term= 2

since the first term is not equal for sn and an the given statement is false.

Thank U.

Answer 2

Answer:

•

=5(1) - 3(1) • 10(1) -8

= 10-8

=5-3 = 2

=2