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Write the first five terms of the sequence whose general term isan=2n−5

Short Answer

Expert verified

The first five terms of the sequence with the general term asan=2n−5are -3,-1,1,3 and 5.

Step by step solution

01

Step 1. Given information

Theexpressionforthegeneraltermsisgivenasan=2n−5Wehavetofindthefirstfivetermsofthesequence.

02

Step 2. Find the first term

Forthefirsttermsubstituten=1,⇒a1=21−5=2−5=−3

03

Step 3. Find the second term

Forthesecondtermsubstituten=2,⇒a2=22−5=4−5=−1

04

Step 4. Find the third term

Forthethirdtermsubstituten=3,⇒a3=23−5=6−5=1

05

Step 5. Find the fourth term

Forthefourthtermsubstituten=4,⇒a4=24−5=8−5=3

06

Step 6. Find the fifth term

Forthefifthtermsubstituten=5,⇒a5=25−5=10−5=5

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