Trish H. answered • 10/13/14

Certified Math Teacher- Individualized Instruction and Test Prep

Rose G.

asked • 10/13/14Find the 16th term when given: 3, 7, 11, 15

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Trish H. answered • 10/13/14

Certified Math Teacher- Individualized Instruction and Test Prep

Ralph L. answered • 10/13/14

Algebra I, II, Visual Basic, Beginning C++ tutor

a_{1 = 3}

a_{2} = 7

a_{3 }= 11

we notice that the next number is 4 more than the previous number

we can use the formula below:

a_{n = }a_{1 }+ (n - 1)d

we have a_{1 }= 3, d = 4

since we're calculating a_{16}, we need n to be equal to 16.

a_{16} = 3 + (16 - 1)4

a_{16 }= 3 + 4(15) = 63

so, **a**_{16} = 63

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